I'm sure you'd all enjoy Sea World- the only problem would be that you have to sit around quite a lot in the heat to watch the shows. I probably wouldn't recommend Busch Gardens for such a young family even though it's one of my favourites, but maybe universal studies (the original one).
You'd probably have a great day no matter where you choose
Thanks! I know we will have a great time no matter where we go! I'm just wondering if there are any lesser known attractions or parks that may be especially good for the little ones?